Combined coal and gas range.



A. F. HARIER. COMBINED COAL AND `GAS RANGE.

APPLICATION FILED AuG.2I. 1914.

Patented Dec. 19,1916.

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A. F. HARTER.

COMBINED COAL AND GAS-RANGE.

Patented De.19,1916.

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AUGUSTUS F. IIARTER, OF CHICAGO, ILLINOIS, ASSIGNCR TOCRIBBEN a SExToNCOMPANY, OF CHICAGO, ILLINOIS, A CORPORATION or ILLINOIS.

COMBINED COAL AND GAS RANGE.

Lacasse.

Specification of Letters Patent.

Patented nee. Ie, 191e.

` Appli-cation filed August 21, 1914. Serial No. 857,826.

'To all 'whom/it may concern.-

Be it `known that I, AUGUSTUS Fi. HARTER, a citizen of the UnitedStates, residing at Chicago, county of Cook, and Stateoflllinois, haveinvented a certain new and useful Improvement in Combined Coal and GasRanges, and declare the following to be a full, clear, and exactdescription of the same, such as will enable others skilled in the artto which it pertains to make and use the same, reference being had tothe accompanying drawings, which form a part of this specification.

My invention has `for its object to make it possible to heat the oven ofa coal range by means of gas in an efficient manner,1withoutAinterfering with the efficiency of the oven when coal is being burned,without greatly altering the construction of the range, and withoutmaking it diflicult or inconvenient to change from coal-heat togas-heat. i

The various features of novelty-whereby my invention is characterizedwill herein- 'after be described with particularity in the claims; but,for a fullunderstanding ofmy invention and of its objecthand advantages,reference may be had-to the-following detailed description takenin-connection with the accompanying drawings, wherein:r

Figure 1 is a front view of a Vwell known type of coal range modified inaccordance with my invention, parts beingbroken away to show the otherparts normally hidden thereby;v Fig. 2 is a section on line 2-2 of Fig.1; Fig. 3 is a section on line 3-3 of Fig. 2; Fig. 4 is a perspectiveview of a closing device for the gas chamber; Fig. 5 is a section online 5-5 of Fig. 1; and Fig. 6 is a top plan view of the oven plate usedwhen burning gas, parts being broken away.

Referring to the drawings, 1 represents a coal range having theusualoven, 2. The wall, 3, of the ovennext to the lire pot, has removedtherefrom a section extendingfrom the front toward the back just abovethe bottom wall, A, of the oven; thus providing an opening, 5, a fewinches high extending approximately throughout the depth of the oven.Outside of the wall, 3, in the ash pit, 6, is acasting, 7, formingwiththe wall, 3, a small chamber, 3, extending from the front to theback and communicating at the upper end with the oven through theopening, 5. The casting, 7, may conveniently be provided with a flange,9,which extends through curved upper portion of the casting, 7

the extreme upper portion of the opening, 5, and projects into the ovenso as to form a ledge just above the effective portion of the opening,5. The exterior of the wall, 3, below the opening, 5, and the interiorof the casting, 7, are preferably lined with asbestos or the like, asindicated at 10 and 11. The casting is preferably so shaped that itcurves gradually inwardly toward the oven toward its upper end. In thelower portion of the casting, 7, is a door, 12, extending approximately`throughout the length thereof. The chamber, 8, is in communication withthe outside atmosphere through the openings, 13, cut through the bottomwall, 14, of the miige' `u th 1 enea i e ranoe Isa as-su inoa 1 e, 15,screwed into ahead, 1gb, whiblji is sbelried to the bottom of the rangejust below the front end of the chamber, 8, and has its outlet endprojecting upwardly through one of serving as an ignition openingthrough which the burner may be lighted when the gas is turned on. Abovethe opening is a second opening, 20, covered with mica, this openlngserving as a window through which the condition of the flame given bythe burner can be seen withoutopening the oven door, 21. lt will now beseen that the serves to deflect the burning gases gently but positivelyso as to cause them to flow through the opening, 5, when the burner islighted, with the result that when the hot gases enter the oven they aretraveling parallel with the bottom of the oven.

Adapted to be detachably placed in the oven is a hollow oven plate'whichmay conveniently be made of a casting, 22, having at one end a liange,23, adapted to rest upon the ledge or flange, 9, and a bottom member,21, of asbestos or the like adapted to rest upon the bottom of the oven.At 110.

, `is removed, the cover plate, 32, is placed in v l'position and thedamper, 35, is closed. .When it is desired to burn gas, the covertending only part way from the edgeV provided with the flange toward thelopposite edge. The member, 22, may also be provided withdownwardly-projecting lugs, 28 and 29, serving as spacers between themembers 22 and 24:; while suitable bolts, 30, serve to connect the twomembers together into la single unit. The under side of the member, 22,for a considerable distance from the edge with the flange, 23, ispreferably lined with asbestos, as indicated at 31.

An angle plate, 32, one member of which is short enough to pass throughthe opening, 5, in the oven while the other member is slightly larger,is adapted to be placed in the opening, 5, to cover the same when theoven is being heated with coal. To do this,

the detachable oven plate is removed, and

the cover plate is then inserted through the oven, the shorter memberbeing passed through the opening, 5, as indicated on dotted lines inFig. 3; whereupon, upon letting go of the cover'plate, it positionsitself by gravity with its larger member completely closing the opening,5.

The top wall of the oven is made hollow so as to provide a broad,shallow chamber, 33, extending from near the front of the oven to itsback where; it communicates with the main draft flue, 34C. A damper, 35,controls communication between the chamber, 33, and the flue, 34. Thechamber, 33, communicates with the interior of the oven through a seriesof perforations, 36, near the front of the chamber.

1When coal is being burned, the oven plate plate, 32, is removed, theoven plate is laid into the oven and the damper, 35, is opened. rlheburner is then ignited through the opening, 19, and the flow of gas isregulated until the flame seen through the window, 20, `is of thecharacter desired. The hot gases flow out of the combustion chamber, 8,and into the oven plate; the foot flange at the front preventing thegases from rising into the oven along the front thereof; and the shortfoot flange at the rear making it necessary for the gases to traveltoward the middle of the oven, at the rear, before they are free. torise. The hot gases are therefore carried to points remote from theburner before they rise into the oven above the oven plate, and theymust then travel toward the front of the oven before they can pass intothe combined outlet and heating chamber in the top wall of the oven. Theresult is that an even, uniform distribution of heat is obtained and,because of the long paths which injured through careless handling of'the range. In accordance with my invention, I provide the bottom of therange with several short permanent legs, 21:0, sufficiently long to takethe weight of the range when the main legs are taken off, but not longenough to be in the way at other times. This insures the gas piping andconnections against injury when the main legs are taken off.

i While I have illustrated and described in detail only a singlepreferred form of my invention, I do not desire to be limited to theexact structural details thus illustrated and described; but intend tocover all forms and arrangements which come within the delinitions of myinvention constituting the appended claims. j i

' I claim:

l. In a combined coal and gas range, an oven having anl elongatedopening extending -through the wall into the ash pitv adjacent to thebottom ofthe oven, an outwardly nand downwardly curved wall extendingfrom the top of said opening tothe bottom of the ash pit and forming acombustion chamber, the latter wall having a flange extending throughthe top of said-opening and projecting into the oven.

2. In a combined coal and gas-range, an oven having an elongated openingextending .through the wall into the ash-pit adjacent to the bottom ofthe oven,anout wardly and downwardlycurved wall extendingfrom the top ofsaid opening to the bottom -of the ash pit and forming a combustionchamber, 'the latter Vwall having alange extending 'through the top ofsaid `opening and 'projecting into the oven, a

burner inthe said combustion chamber, and an oven plate engaging withthe aforesaid flange for directing the hot gases from said chamber alonOthe bottomV of the oven.

3. The combination with a coal range, of a combustion chamber formed outof the lower corner of the ash pit adjacent to the joven, there being anopeningy leading from the upper portion of the chamber into the ovenjust above the oven bottom, and an oven plate comprising a heatinsulating member adapted to rest upon andeover the oven bottom and anupper member lying above the other member and adapted to extend from thewall of the oven just above said opening almost across the oven, andsaid chamber having therein a door leading to the ash pit andV largeenough to permit the insertion and removal of the burner therethrough.

4. The combination with a coal range, of a combustion chamber formed outof the lower corner of the ash pit adjacent to the oven, there being anopening leading from the upper portion of the chamber into the oven justabove the oven bottom, and an oven plate comprising a heat insulatingmember adapted to rest upon and cover the oven bottom and an uppermember lying above the other member and adapted to extend from the wallof the oven just above said opening almost across the oven. j

5. The combination with a coal range, of a combustion chamber formed outof the lower corner of the ash pit adjacent to the oven, there being anopening leading from the upper portion of the chamber into the oven justabove the oven bottom, and an oven plate comprising a heat insulatingmember adapted to rest upon and cover the oven bottom and an uppermember lying above the other member and adapted to extend Copies of thispatent may be obtained for iive cents each, by addressing Y Washington,D. C.

from the wall of the oven just above said opening almost across theoven, said upper member having an imperforate foot flange along thefront edge and adapted to rest on the oven bottom.

6. The combination with a coal range, ofa combustion chamber formed outof the lower corner of the ash pit adjacent to the oven, there being anopening leading from the upper portion of the chamber into the oven justabove the oven bottom, and an oven plate comprising a heat insulatingmember adapted to rest upon and cover the oven bottom and an uppermember lying above the other member and adapted to extend from the wallof the oven just above said opening almost across the oven, said uppermember having an imperforate foot iange along the front edge and adaptedto rest on the oven bottom, said upper member having also a similar footiiange extending along the rear edge for a considerable distance fromthe edge next to said opening.

ln testimony whereof, sign this specication in the presence of twowitnesses.

AUGUSTUS F. HARTER.

Witnesses:

FRED J. BOHLE, PETER BAUM.

the Commissioner of Patents,

